Authors
SW Fitzpatrick, JC Gerberich, JA Kronenberger, LM Angeloni, WC Funk
Publication date
2015/1
Journal
Ecology Letters
Volume
18
Issue
1
Pages
37-47
Description
Gene flow between phenotypically divergent populations can disrupt local adaptation or, alternatively, may stimulate adaptive evolution by increasing genetic variation. We capitalised on historical Trinidadian guppy transplant experiments to test the phenotypic effects of increased gene flow caused by replicated introductions of adaptively divergent guppies, which were translocated from high‐ to low‐predation environments. We sampled two native populations prior to the onset of gene flow, six historic introduction sites, introduction sources and multiple downstream points in each basin. Extensive gene flow from introductions occurred in all streams, yet adaptive phenotypic divergence across a gradient in predation level was maintained. Descendants of guppies from a high‐predation source site showed high phenotypic similarity with native low‐predation guppies in as few as ~12 generations after gene flow, likely …
Scholar articles
SW Fitzpatrick, JC Gerberich, JA Kronenberger… - Ecology Letters, 2015